SQL语句判断

1、

      /// 

        /// 判断是否存在某表的某个字段
        /// 
        /// 表名称
        /// 列名称
        /// 是否存在
        public static bool ColumnExists(string tableName, string columnName)
        {
            string sql = "select count(1) from syscolumns where [id]=object_id('" + tableName + "') and [name]='" + columnName + "'";
            object res = GetSingle(sql);
            if (res == null)
            {
                return false;
            }
            return Convert.ToInt32(res) > 0;
        }



//带参数的SQL
   /// 

        /// 删除
        /// 
        /// 
        ///